Weather Alerts for California

Your Recent Locations:  Los Angeles, CA  

1. Red Flag Warning for: North Bay Mountains

2. Red Flag Warning for: East Bay Hills and the Diablo Range

3. Red Flag Warning for: Interior Mendocino; W Mendocino NF, E Mendocino Unit

4. Red Flag Warning for: Central Sacramento Valley including Glenn, Colusa, Yuba, Northern Sutter, Butte County Below 1000 Ft; E Mendocino NF; Eastern Delta; Eastern Portion of Shasta, Trinity NF; Lake County Portion of Lake-Nappa-Sonoma RU; Northern Motherlode From 1000 to 3000 Ft. From Yuba To Amador Counties; Northern Sacramento Valley to Southern Tehama County Line Below 1000 Ft; Northern Sierra Foothills from 1000 to 3000 Ft. Includes Nevada-Yuba-Placer RU and Anador-Eldorado RU; Northern Sierra Including Lassen NP and Plumas and Lassen NF, S West of the Sierra Crest - West of Evans Peak, Grizzly Peak, Beckworth Peak; Southern Motherlode From 1000 to 3000 Ft, Calaveras and Toulumne Counties; Southern Sacramento Valley In Yolo, Sacramento, Far Western Placer, Southern Sutter and Solano County Below 1000 Ft - Excludes the Delta; Southern and Eastern Mendocino NF, Southeast Edge Shasta, Trinity NF and Western Portions of Tahima, Glenn RU; Stanislaus National Forest; Tahoe - Eldorado National Forest

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Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

Current U.S. National Radar

National Weather Forecast--Current

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Todays National Weather Map

National Weather Forecast for Tomorrow

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Tomorrows National Weather Map

North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds ); brown indicates very little moisture present; black indicates no moisture.

North American Water Vapor Map

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Weather Topic: What are Altocumulus Clouds?

Home - Education - Cloud Types - Altocumulus Clouds

altocumulus clouds Next Topic: Altostratus Clouds

Similar to cirrocumulus clouds, altocumulus clouds are characterized by cloud patches. They are distinguished by larger cloudlets than cirrocumulus clouds but are still smaller than stratocumulus clouds.

Altocumulus clouds most commonly form in middle altitudes (between 2 and 5 km) and may resemble, at times, the shape of a flying saucer. These uncommon formations, called altocumulus lenticularis, are created by uplift in the atmosphere and are most often seen in close proximity to mountains.

Next Topic: Altostratus Clouds

Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

cumulus clouds Next Topic: Cumulonimbus Clouds

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Cumulonimbus Clouds